Adjustable support for drills and the like.



A. w. PETERSON.

ADJUSTABLE SUPPORT FOR DRILLS AND THE LIKE.

APPLICATION FILED MAY 16. 1917.;

1 ,279, 1 53 Patented Sept. 17, 1918.

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H ;:1; I I H lllllllllllllll LI"! A. W. PETERSON.

ADJUSTABLE SUPPORT FOR DRILLS AND THE LIKE.

APPLICATION FILED MAY 16, I917.

Patented Sept. 17,, 1918..

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a citizen of the United States, residing at ADJUSTABLE SUPPORT non DBILLSAN'DTHE LIKE.

. Specification of LettersIatentF Patented Sept. 17, 1918.

Application filed. May 16, 1917. SeriaI No. 169,077. i

To all whom it may concern:

Be it known that I, ARTHUR W. PETERSON,

WVorcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Adjustable Support for Drills and the like, of which the following is a specification.

This invention relates to an adjustable support particularly designed for use with ratchet drills and other similar tools.

"To render such tools effective it is essen-; tial that a rigid supportorbrace be provided against which the thrust of the'toolmay be received. These tools are commonly used to drill holes and perform other operations on [structural steel members of all sizes and shapes as well as on pipes andtubes of different diameters, and the provis on of a suitable support under such conditions 1s often a troublesome problem.- The difliculty is often increased by thelimited space and the awkward positions in which the operations must be performed.

It is the object of my. inventlon to provide an improved adjustable support for such purposes which is adaptable for use under widely differing conditlons, I

An important feature of my invent on relates to'the devices by which .the support' may be attached to the different structures on which it is used. i

Other features of my invention relate to arrangements and combinations of parts hereinafter described and more particularly pointed out inthe appended claims. Apreferred form of my invention is shown hole is to be drilled through the foot of the I-beam;

Fig. 41 shows the support applied to a large pipe or tube; V

Fig. 5 is a bottom plan view of the bar underlying the I-beam in Fig. 2, and

Fig. 6 is an end elevation of the rocking lever which is pivotally mounted on said bar.

Referring particularly to Fig. 1 in which 1 have shown my adjustable support applied toan I-beam A, itwill be seen that the support omprises a bar 10, a rod 11, a brace arm 12, a rocking lever 13, a toothed rod 1 1, anadjustable engaging device 15, and a clamp 16. i i

The construction of the bar 10 is best shown in Fig. 5. A series of perforations extend transversely through the bar, and the bar is alsoprovided with a series of slots 21, extending at right angle to the perforations 20. At one end the bar is divided or. split as far as thefirst slot 21. This split portion includes a bearing 22, for the rod 11, and

clamping bolts 23 are providedfor drawing the two parts of the bartogether 011 each side of the bearing. The rod 11 is longitudinally adjustable in this bearing,and may thus be held rigidly in any desired position.

The lever 13 is pivoted to the bar 10 by a stud 25 extending through a selected perforation20 in said bar. Inwardly projectingears 26 (Fig. 6) prevent accidental displacement of the lever fromthe bar, when the stud is removed. Aclamping screw 27 is threaded 1nto one end of the lever,and engages the bar 10, thusforcingthe opposite end of the levertoward the bar,- and applying lamping pressure to the structure upon which the support is being used. The simplest use of the lever 13 is shown in Figs. 2 and 8. j i j I j I The bar-10 is also provided'with a hookshaped projection 10* at one end, which is shown in use in Fig. 3. The clamp 16 is adjustable along the rod 11 to any desired position, as shown in Figs. land 2, and the brace arm 12 may also be clamped to the rod 11 in any desired longitudinal or angular position. The ends of the parts 12 and 16 are split similar to the bar 10 and are drawn together by clamping bolts to firmly grip the rod 11.

In Fig. 2 I have also shown a supplementary rod 28 adjustable upon the rod 11, and supporting the brace arm 12. In this view I have also shown the rod 11 as extended upwardly into a slight recess cut in the cement floor F, this being a convenient means forsupporting the upper end of the rod, when it is impossible to secure access to the upper'surface of the I-beam or other structure to which the support is to be applied. A ratchet tool of the usual type is indi- 'ingly forced into engagement with the use of the toothed rod 14 pivoted to the lever 13 and provided with an engaging device 15 having a projecting lug 15 yieldtoothed rod by a spring 30. This enables me to clamp the device to the lower face of any supporting structure, regardless of the I width thereof, and without the use of supplementary pieces.

In Fig. 4 I have shown the devlce applied to. a large pipe or tube B and for this purpose I use a chain 31, one end of which is provided with a stud 82. threaded into the clamp 16 and the opposite end portion of which is secured to the rocking lever 13. The chain is thus drawn firmly about the pipe and the support is held rigidly in any desired position. Theslots 21 are provided as clearance spaces forthe idle part of the chain.

While I have shown only a few uses of my improved support it will be evident that there is no limit to the number of different structures to which it may be applied.

Having thus described my inventionfit will be evident that changes and modificacan be made therein, by those skilled in the art without departing from the scope and spirit of my invention as set forth in the claims, and I do not wish. to be otherwise limited to the details herein disclosed but what I do claim is 1.. An adjustable support comprising a bar, a; rod perpendicular thereto, means to secure said bar and rod together, a rocking lever,-means 'topivotally secure said lever in any one of a series of operative positions on said bar, means to rock said lever about its pivot, thereby exerting pressure substantially perpendicular to said bar and securing said support to the structure to which Copies 01' this patent may be obtained for it is applied, and means mounted on said rod effective to resist the thrust/of a tool operating against said structure.

2. An adjustable support comprising a bar, a rod, means to secure said rod in longi tudinally adjusted position in said bar, a

rocking lever, means to'pivotally secure said lever in any one of a series of operative positions on sai dbar, an engaging: device ad justably connected to said lever, means to rock said lever to render 'saidengaging device operative and means mounted on said rod effective to resist the thrust of a tool operating against the structure to. which said support is applied.

3. An adjustable support comprising a bar having a series of perforations there-- through and having a split bearing near one end, a rodlongitudinally adjustable in said bearing, a brace arm, means to clamp saidarm inadjusted position on said rod, a lever, a stud by which said lever may be pivoted to said bar at any one of the perforations therethrough, .means carried by said rod and lever effective to engagerand grip the structure to which the support is applied, and means to'move said lever.

4. An adjustable support comprising. a

bar, a rod, means to secure said rod in longL.

tudinally adjusted position in said bar, a

clamping lever, means to pivotally secure In testimony whereof I have hereunto afiixed my signature.

ARTHUR w. PETERSON; V

five cents each. byfaddr e ssing the Commissioner of Batents, Washington, D. G. 

